I'd be interested in seeing Kevin Crawford's game Godbound. I haven't played it so it might not work well as a one-shot to get the full effect of the game. However, it does seem like a nice mix of familiar OSR mechanics with some new concepts with the demigod powers, so it might be easy for people to pick up quickly.
I'm interested in the shift from "we are level 1 adventurers" to "we are demigods with immense power." Both narratively and mechanically, I'd love to see what the PCs would do with the power.
And Adam could have fun exploring power in religion some more